Punishees regularly ask for justification. But is justification also effective? To answer this question under controlled conditions, we have conducted a public goods experiment with central punishment. The authority is neutral – she does not benefit from contributions to the public good....

We study experimentally whether and to what extent impartial decision makers are influenced by stakeholders’ fairness opinions in an allocation decision. The setting allows for different focal fairness rules to be considered. We compare communication treatments, in which one of the...

We study how participation in decision processes shapes people's behavior towards impartial authorities. In an incentivized laboratory experiment, an impartial decision maker at first decides about the allocation of money between two subordinates. Treatments differ in the opportunity for one...

Both in the field and in the lab, participants frequently cooperate, despite the fact that the situation can be modelled as a simultaneous, symmetric prisoner’s dilemma. This experiment manipulates the payoff in case both players defect, and explains the degree of cooperation by a combination...

The paper investigates the introduction of an institution, in form of an impartial authority (third party), into a two-person situation. The impartial authority can reward a stranger for acting according to a desired behavioral norm. The reward is costly for the authority and her behavior cannot...

From the perspective of competitors, competition may be modeled as a prisoner’s dilemma. Setting the monopoly price is cooperation, undercutting is defection. Jointly, competitors are better off if both are faithful to a cartel. Individually, profit is highest if only the competitor(s) is...

Empirically, the commons are not as tragic as standard theory predicts. The predominant explanation for this finding is conditional cooperation. Yet many real life situations involve insiders, who are directly affected by a dilemma, and outsiders, who may be harmed if the insiders overcome the...